[TYPO3-core] RFC: Bug #14121: [felogin] Use piVars instead of _GP

[Sascha Egerer]

This is an SVN patch request.

Type: New feature / Bugfix

Bugtracker references:
http://bugs.typo3.org/view.php?id=14121

Branches:
4-3, trunk

Problem:
felogin is using t3lib_div::_GP(). The problem is that you can't use 
_DEFAULT_PI_VARS in TypoScript.


Solution:
Change the t3lib_div::_GP() calls to $this->piVars[] and keep the _GP 
stuff for compatibility

Notes:
Maybe you want a "logout" link in you menu. You can easily create a page 
"logout" wich is displayed in you Menu. But you have to add a plugin on 
this page and the user has to click on logut on this page again.
It would be much better if you can set this "logout" action by default 
to this page with typoscript.
Something like this

# page 543 is the logout page wich is displayed in the menu
[globalVar = TSFE:id=543]
plugin.tx_felogin_pi1._DEFAULT_PI_VARS.logintype = logout
[global]

Cheers
Sascha Egerer
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